<template>
  <div class="candlestick">
    <div class="one">
      <p>基础K线图</p>
      <div id="candlestick-one"></div>
    </div>
    <div class="two">
      <p>上证指数图</p>
      <div id="candlestick-two"></div>
    </div>
    <div class="three">
      <p>大数据K线图</p>
      <div id="candlestick-three"></div>
    </div>
  </div>
</template>

<script>
import * as echarts from 'echarts';
export default {
  data(){
    return {}
  },
  mounted(){
    // 基础K线图
    this.getOne()
    // 上证指数图
    this.getTwo()
    // 大数据K线图
    this.getThree()
  },
  methods: {
    // 基础K线图
    getOne(){
      var chartDom = document.getElementById('candlestick-one');
      var myChart = echarts.init(chartDom);
      var option;

      option = {
        xAxis: {
          data: ['2017-10-24', '2017-10-25', '2017-10-26', '2017-10-27']
        },
        yAxis: {},
        series: [
          {
            type: 'candlestick',
            data: [
              [20, 34, 10, 38],
              [40, 35, 30, 50],
              [31, 38, 33, 44],
              [38, 15, 5, 42]
            ]
          }
        ]
      };

      option && myChart.setOption(option);
    },
    // 上证指数图
    getTwo(){
      var chartDom = document.getElementById('candlestick-two');
      var myChart = echarts.init(chartDom);
      var option;

      const upColor = '#ec0000';
      const upBorderColor = '#8A0000';
      const downColor = '#00da3c';
      const downBorderColor = '#008F28';
      // Each item: open，close，lowest，highest
      const data0 = splitData([
        ['2013/1/24', 2320.26, 2320.26, 2287.3, 2362.94],
        ['2013/1/25', 2300, 2291.3, 2288.26, 2308.38],
        ['2013/1/28', 2295.35, 2346.5, 2295.35, 2346.92],
        ['2013/1/29', 2347.22, 2358.98, 2337.35, 2363.8],
        ['2013/1/30', 2360.75, 2382.48, 2347.89, 2383.76],
        ['2013/1/31', 2383.43, 2385.42, 2371.23, 2391.82],
        ['2013/2/1', 2377.41, 2419.02, 2369.57, 2421.15],
        ['2013/2/4', 2425.92, 2428.15, 2417.58, 2440.38],
        ['2013/2/5', 2411, 2433.13, 2403.3, 2437.42],
        ['2013/2/6', 2432.68, 2434.48, 2427.7, 2441.73],
        ['2013/2/7', 2430.69, 2418.53, 2394.22, 2433.89],
        ['2013/2/8', 2416.62, 2432.4, 2414.4, 2443.03],
        ['2013/2/18', 2441.91, 2421.56, 2415.43, 2444.8],
        ['2013/2/19', 2420.26, 2382.91, 2373.53, 2427.07],
        ['2013/2/20', 2383.49, 2397.18, 2370.61, 2397.94],
        ['2013/2/21', 2378.82, 2325.95, 2309.17, 2378.82],
        ['2013/2/22', 2322.94, 2314.16, 2308.76, 2330.88],
        ['2013/2/25', 2320.62, 2325.82, 2315.01, 2338.78],
        ['2013/2/26', 2313.74, 2293.34, 2289.89, 2340.71],
        ['2013/2/27', 2297.77, 2313.22, 2292.03, 2324.63],
        ['2013/2/28', 2322.32, 2365.59, 2308.92, 2366.16],
        ['2013/3/1', 2364.54, 2359.51, 2330.86, 2369.65],
        ['2013/3/4', 2332.08, 2273.4, 2259.25, 2333.54],
        ['2013/3/5', 2274.81, 2326.31, 2270.1, 2328.14],
        ['2013/3/6', 2333.61, 2347.18, 2321.6, 2351.44],
        ['2013/3/7', 2340.44, 2324.29, 2304.27, 2352.02],
        ['2013/3/8', 2326.42, 2318.61, 2314.59, 2333.67],
        ['2013/3/11', 2314.68, 2310.59, 2296.58, 2320.96],
        ['2013/3/12', 2309.16, 2286.6, 2264.83, 2333.29],
        ['2013/3/13', 2282.17, 2263.97, 2253.25, 2286.33],
        ['2013/3/14', 2255.77, 2270.28, 2253.31, 2276.22],
        ['2013/3/15', 2269.31, 2278.4, 2250, 2312.08],
        ['2013/3/18', 2267.29, 2240.02, 2239.21, 2276.05],
        ['2013/3/19', 2244.26, 2257.43, 2232.02, 2261.31],
        ['2013/3/20', 2257.74, 2317.37, 2257.42, 2317.86],
        ['2013/3/21', 2318.21, 2324.24, 2311.6, 2330.81],
        ['2013/3/22', 2321.4, 2328.28, 2314.97, 2332],
        ['2013/3/25', 2334.74, 2326.72, 2319.91, 2344.89],
        ['2013/3/26', 2318.58, 2297.67, 2281.12, 2319.99],
        ['2013/3/27', 2299.38, 2301.26, 2289, 2323.48],
        ['2013/3/28', 2273.55, 2236.3, 2232.91, 2273.55],
        ['2013/3/29', 2238.49, 2236.62, 2228.81, 2246.87],
        ['2013/4/1', 2229.46, 2234.4, 2227.31, 2243.95],
        ['2013/4/2', 2234.9, 2227.74, 2220.44, 2253.42],
        ['2013/4/3', 2232.69, 2225.29, 2217.25, 2241.34],
        ['2013/4/8', 2196.24, 2211.59, 2180.67, 2212.59],
        ['2013/4/9', 2215.47, 2225.77, 2215.47, 2234.73],
        ['2013/4/10', 2224.93, 2226.13, 2212.56, 2233.04],
        ['2013/4/11', 2236.98, 2219.55, 2217.26, 2242.48],
        ['2013/4/12', 2218.09, 2206.78, 2204.44, 2226.26],
        ['2013/4/15', 2199.91, 2181.94, 2177.39, 2204.99],
        ['2013/4/16', 2169.63, 2194.85, 2165.78, 2196.43],
        ['2013/4/17', 2195.03, 2193.8, 2178.47, 2197.51],
        ['2013/4/18', 2181.82, 2197.6, 2175.44, 2206.03],
        ['2013/4/19', 2201.12, 2244.64, 2200.58, 2250.11],
        ['2013/4/22', 2236.4, 2242.17, 2232.26, 2245.12],
        ['2013/4/23', 2242.62, 2184.54, 2182.81, 2242.62],
        ['2013/4/24', 2187.35, 2218.32, 2184.11, 2226.12],
        ['2013/4/25', 2213.19, 2199.31, 2191.85, 2224.63],
        ['2013/4/26', 2203.89, 2177.91, 2173.86, 2210.58],
        ['2013/5/2', 2170.78, 2174.12, 2161.14, 2179.65],
        ['2013/5/3', 2179.05, 2205.5, 2179.05, 2222.81],
        ['2013/5/6', 2212.5, 2231.17, 2212.5, 2236.07],
        ['2013/5/7', 2227.86, 2235.57, 2219.44, 2240.26],
        ['2013/5/8', 2242.39, 2246.3, 2235.42, 2255.21],
        ['2013/5/9', 2246.96, 2232.97, 2221.38, 2247.86],
        ['2013/5/10', 2228.82, 2246.83, 2225.81, 2247.67],
        ['2013/5/13', 2247.68, 2241.92, 2231.36, 2250.85],
        ['2013/5/14', 2238.9, 2217.01, 2205.87, 2239.93],
        ['2013/5/15', 2217.09, 2224.8, 2213.58, 2225.19],
        ['2013/5/16', 2221.34, 2251.81, 2210.77, 2252.87],
        ['2013/5/17', 2249.81, 2282.87, 2248.41, 2288.09],
        ['2013/5/20', 2286.33, 2299.99, 2281.9, 2309.39],
        ['2013/5/21', 2297.11, 2305.11, 2290.12, 2305.3],
        ['2013/5/22', 2303.75, 2302.4, 2292.43, 2314.18],
        ['2013/5/23', 2293.81, 2275.67, 2274.1, 2304.95],
        ['2013/5/24', 2281.45, 2288.53, 2270.25, 2292.59],
        ['2013/5/27', 2286.66, 2293.08, 2283.94, 2301.7],
        ['2013/5/28', 2293.4, 2321.32, 2281.47, 2322.1],
        ['2013/5/29', 2323.54, 2324.02, 2321.17, 2334.33],
        ['2013/5/30', 2316.25, 2317.75, 2310.49, 2325.72],
        ['2013/5/31', 2320.74, 2300.59, 2299.37, 2325.53],
        ['2013/6/3', 2300.21, 2299.25, 2294.11, 2313.43],
        ['2013/6/4', 2297.1, 2272.42, 2264.76, 2297.1],
        ['2013/6/5', 2270.71, 2270.93, 2260.87, 2276.86],
        ['2013/6/6', 2264.43, 2242.11, 2240.07, 2266.69],
        ['2013/6/7', 2242.26, 2210.9, 2205.07, 2250.63],
        ['2013/6/13', 2190.1, 2148.35, 2126.22, 2190.1]
      ]);
      function splitData(rawData) {
        const categoryData = [];
        const values = [];
        for (var i = 0; i < rawData.length; i++) {
          categoryData.push(rawData[i].splice(0, 1)[0]);
          values.push(rawData[i]);
        }
        return {
          categoryData: categoryData,
          values: values
        };
      }
      function calculateMA(dayCount) {
        var result = [];
        for (var i = 0, len = data0.values.length; i < len; i++) {
          if (i < dayCount) {
            result.push('-');
            continue;
          }
          var sum = 0;
          for (var j = 0; j < dayCount; j++) {
            sum += +data0.values[i - j][1];
          }
          result.push(sum / dayCount);
        }
        return result;
      }
      option = {
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross'
          }
        },
        legend: {
          data: ['日K', 'MA5', 'MA10', 'MA20', 'MA30']
        },
        grid: {
          left: '10%',
          right: '10%',
          bottom: '15%'
        },
        xAxis: {
          type: 'category',
          data: data0.categoryData,
          boundaryGap: false,
          axisLine: { onZero: false },
          splitLine: { show: false },
          min: 'dataMin',
          max: 'dataMax'
        },
        yAxis: {
          scale: true,
          splitArea: {
            show: true
          }
        },
        dataZoom: [
          {
            type: 'inside',
            start: 50,
            end: 100
          },
          {
            show: true,
            type: 'slider',
            top: '90%',
            start: 50,
            end: 100
          }
        ],
        series: [
          {
            name: '日K',
            type: 'candlestick',
            data: data0.values,
            itemStyle: {
              color: upColor,
              color0: downColor,
              borderColor: upBorderColor,
              borderColor0: downBorderColor
            },
            markPoint: {
              label: {
                formatter: function (param) {
                  return param != null ? Math.round(param.value) + '' : '';
                }
              },
              data: [
                {
                  name: 'Mark',
                  coord: ['2013/5/31', 2300],
                  value: 2300,
                  itemStyle: {
                    color: 'rgb(41,60,85)'
                  }
                },
                {
                  name: 'highest value',
                  type: 'max',
                  valueDim: 'highest'
                },
                {
                  name: 'lowest value',
                  type: 'min',
                  valueDim: 'lowest'
                },
                {
                  name: 'average value on close',
                  type: 'average',
                  valueDim: 'close'
                }
              ],
              tooltip: {
                formatter: function (param) {
                  return param.name + '<br>' + (param.data.coord || '');
                }
              }
            },
            markLine: {
              symbol: ['none', 'none'],
              data: [
                [
                  {
                    name: 'from lowest to highest',
                    type: 'min',
                    valueDim: 'lowest',
                    symbol: 'circle',
                    symbolSize: 10,
                    label: {
                      show: false
                    },
                    emphasis: {
                      label: {
                        show: false
                      }
                    }
                  },
                  {
                    type: 'max',
                    valueDim: 'highest',
                    symbol: 'circle',
                    symbolSize: 10,
                    label: {
                      show: false
                    },
                    emphasis: {
                      label: {
                        show: false
                      }
                    }
                  }
                ],
                {
                  name: 'min line on close',
                  type: 'min',
                  valueDim: 'close'
                },
                {
                  name: 'max line on close',
                  type: 'max',
                  valueDim: 'close'
                }
              ]
            }
          },
          {
            name: 'MA5',
            type: 'line',
            data: calculateMA(5),
            smooth: true,
            lineStyle: {
              opacity: 0.5
            }
          },
          {
            name: 'MA10',
            type: 'line',
            data: calculateMA(10),
            smooth: true,
            lineStyle: {
              opacity: 0.5
            }
          },
          {
            name: 'MA20',
            type: 'line',
            data: calculateMA(20),
            smooth: true,
            lineStyle: {
              opacity: 0.5
            }
          },
          {
            name: 'MA30',
            type: 'line',
            data: calculateMA(30),
            smooth: true,
            lineStyle: {
              opacity: 0.5
            }
          }
        ]
      };

      option && myChart.setOption(option);
    },
    // 大数据K线图
    getThree(){
      var chartDom = document.getElementById('candlestick-three');
      var myChart = echarts.init(chartDom);
      var option;
      const upColor = '#ec0000';
      const upBorderColor = '#8A0000';
      const downColor = '#00da3c';
      const downBorderColor = '#008F28';
      const dataCount = 2e5;
      const data = generateOHLC(dataCount);
      option = {
        dataset: {
          source: data
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'line'
          }
        },
        toolbox: {
          feature: {
            dataZoom: {
              yAxisIndex: false
            }
          }
        },
        grid: [
          {
            left: '10%',
            right: '10%',
            bottom: 200
          },
          {
            left: '10%',
            right: '10%',
            height: 80,
            bottom: 80
          }
        ],
        xAxis: [
          {
            type: 'category',
            boundaryGap: false,
            // inverse: true,
            axisLine: { onZero: false },
            splitLine: { show: false },
            min: 'dataMin',
            max: 'dataMax'
          },
          {
            type: 'category',
            gridIndex: 1,
            boundaryGap: false,
            axisLine: { onZero: false },
            axisTick: { show: false },
            splitLine: { show: false },
            axisLabel: { show: false },
            min: 'dataMin',
            max: 'dataMax'
          }
        ],
        yAxis: [
          {
            scale: true,
            splitArea: {
              show: true
            }
          },
          {
            scale: true,
            gridIndex: 1,
            splitNumber: 2,
            axisLabel: { show: false },
            axisLine: { show: false },
            axisTick: { show: false },
            splitLine: { show: false }
          }
        ],
        dataZoom: [
          {
            type: 'inside',
            xAxisIndex: [0, 1],
            start: 10,
            end: 100
          },
          {
            show: true,
            xAxisIndex: [0, 1],
            type: 'slider',
            bottom: 10,
            start: 10,
            end: 100
          }
        ],
        visualMap: {
          show: false,
          seriesIndex: 1,
          dimension: 6,
          pieces: [
            {
              value: 1,
              color: upColor
            },
            {
              value: -1,
              color: downColor
            }
          ]
        },
        series: [
          {
            type: 'candlestick',
            itemStyle: {
              color: upColor,
              color0: downColor,
              borderColor: upBorderColor,
              borderColor0: downBorderColor
            },
            encode: {
              x: 0,
              y: [1, 4, 3, 2]
            }
          },
          {
            name: 'Volumn',
            type: 'bar',
            xAxisIndex: 1,
            yAxisIndex: 1,
            itemStyle: {
              color: '#7fbe9e'
            },
            large: true,
            encode: {
              x: 0,
              y: 5
            }
          }
        ]
      };
      function generateOHLC(count) {
        let data = [];
        let xValue = +new Date(2011, 0, 1);
        let minute = 60 * 1000;
        let baseValue = Math.random() * 12000;
        let boxVals = new Array(4);
        let dayRange = 12;
        for (let i = 0; i < count; i++) {
          baseValue = baseValue + Math.random() * 20 - 10;
          for (let j = 0; j < 4; j++) {
            boxVals[j] = (Math.random() - 0.5) * dayRange + baseValue;
          }
          boxVals.sort();
          let openIdx = Math.round(Math.random() * 3);
          let closeIdx = Math.round(Math.random() * 2);
          if (closeIdx === openIdx) {
            closeIdx++;
          }
          let volumn = boxVals[3] * (1000 + Math.random() * 500);
          // ['open', 'close', 'lowest', 'highest', 'volumn']
          // [1, 4, 3, 2]
          data[i] = [
            echarts.format.formatTime('yyyy-MM-dd\nhh:mm:ss', (xValue += minute)),
            +boxVals[openIdx].toFixed(2),
            +boxVals[3].toFixed(2),
            +boxVals[0].toFixed(2),
            +boxVals[closeIdx].toFixed(2),
            +volumn.toFixed(0),
            getSign(data, i, +boxVals[openIdx], +boxVals[closeIdx], 4) // sign
          ];
        }
        return data;
        function getSign(data, dataIndex, openVal, closeVal, closeDimIdx) {
          var sign;
          if (openVal > closeVal) {
            sign = -1;
          } else if (openVal < closeVal) {
            sign = 1;
          } else {
            sign =
              dataIndex > 0
                ? // If close === open, compare with close of last record
                  data[dataIndex - 1][closeDimIdx] <= closeVal
                  ? 1
                  : -1
                : // No record of previous, set to be positive
                  1;
          }
          return sign;
        }
      }

      option && myChart.setOption(option);

    }
  }
}
</script>

<style lang="scss" scoped>
p {
  height: 50px;
  line-height: 50px;
  text-align: center;
  font-weight: 700;
  border-bottom: 1px solid #ccc;
}
.candlestick {
  width: 100%;
  height: auto;
  .one {
    border: 1px solid #ccc;
    box-sizing: border-box;
    #candlestick-one {
      height: 400px;
      display: flex;
      justify-content: center;
      align-items: center;
    }
  }
  .two {
    border: 1px solid #ccc;
    box-sizing: border-box;
    #candlestick-two {
      height: 400px;
      display: flex;
      justify-content: center;
      align-items: center;
    }
  }
  .three {
    border: 1px solid #ccc;
    box-sizing: border-box;
    #candlestick-three {
      height: 400px;
      display: flex;
      justify-content: center;
      align-items: center;
    }
  }
}
</style>